Owners Manual

tx on Enter the keywords tx on to send control frames from this
port to the connected device when a higher rate of traffic is
received.
tx off Enter the keywords tx off so that flow control frames are
not sent from this port to the connected device when a
higher rate of traffic is received.
negotiate (Optional) Enter the keyword negotiate to enable the
pause-negotiation with the egress port of the peer device. If
the negotiate command is not used, pause-negotiation is
disabled. 40 gigabit Ethernet interfaces do not support
pause-negotiation
Defaults rx on tx off
Command
Modes
INTERFACE
Command
History
This guide is platform-specific. For command information about other platforms,
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.7(0.0) Introduced on the S6000-ON.
9.6.0.0 Added support for the negotiate feature on the S4810 and
S4820T.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
8.1.1.0 Introduced on the E-Series ExaScale.
6.5.1.9 and 7.4.1.0 Introduced on the E-Series.
7.8.1.0 Introduced on the C-Series and S-Series with the
thresholds option.
Usage
Information
The globally assigned 48-bit Multicast address 01-80-C2-00-00-01 is used to send
and receive pause frames. To allow full-duplex flow control, stations implementing
the pause operation instruct the MAC to enable the reception of frames with a
destination address equal to this multicast address.
When a port receives traffic at a higher rate than it can process, the frames are
stored in the port buffer. As a result, buffer usage increases. When the buffer usage
reaches the value specified in the “pause-threshold” argument, the port sends
PAUSE frame to the connected link partner to stop sending the traffic. Eventually
this reduces the buffer usage. When the buffer usage drops by the value specified
Interfaces
767